皮皮学，免费搜题
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【单选题】
( ) 用来提供 一 形及数 值的信号A.
万用表
B.
电子毫伏表
C.
示波器
D.
信发生器
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参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】下面关于铁的吸收，错误的是______。
A.
Fe 2+ 比Fe 3+ 易吸收
B.
胃酸能促进铁的吸收
C.
出血后铁的吸收率降低
D.
吸收的主要部位是小肠上部
E.
胃大部分切除后的病人常伴有缺铁性贫血
【单选题】Guo Yue did quite ____ at the World Table tennis Championship, but Zhang Yining did even ____.
A.
better, well
B.
well, well
C.
well, better
D.
better, better
【单选题】Guo Yue did quite at the World Table Tennis Championship (锦标赛) , but Zhang Yining did even .
A.
better, well
B.
good, better
C.
well, better
【单选题】Guo Yue did quite at the World Table Tennis Championship(锦标赛), but Zhang Yining did even .
A.
better, well
B.
well, well
C.
well, better
D.
bette better
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